﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test.Date
{
    public class Calculator
    {
        public int Add(int a,int b) 
        { 
        return a + b;
        } 
    }

    //1、在Test.Date中添加类Calculator用于计算

    //2、用public修饰 Calculator


}
